def is_correct_brackets(text):
    while '()' in text or '[]' in text or '{}' in text or '<>' in text:
        text = text.replace('()', '')
        text = text.replace('[]', '')
        text = text.replace('{}', '')
        text = text.replace('<>', '')

    # Возвращаем True, если text с пустой строкой
    return not text
   

s = 'Y'

while s != 'n':
    inputString = input("Введите последовательность скобок: ")
    print(is_correct_brackets(inputString.strip()))
    print('Continue?', 'Enter n or y')
    s = input()
print('end')
